For example, if you're selling software for a game and a cookbook, you'd want to differentiate what they are. You can do so with Categories.
To create a category where your customers can find your products in under a few seconds, follow the steps below:
Navigate to your categories dashboard by clicking here.
You will find a purple "Add Category" button. When you click on it, you will be redirected to a page where you can create a category.
When you're on the category create page, add a name/title of the category, then select the products that are in that category, and any groups.
Select the priority level to sort categories. This is ranked by ascending order.
Optional: You can select "Unlisted" to hide the category from your storefront for future reference.
... and you're done! You've successfully created your own product category.
To create your own product group, check out this article.